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Moon journey Twelve^279 The three astronauts worked and slept in the command module. Mission commander Neil Armstrong struggled ...

The lunar module was nicknamed the Eagle. Why is there no blue sky on the moon? 280 The universe On 20 July 1969, Neil Armstrong ...

Men on the moon Because the moon has no atmosphere.^281 Neil Armstrong Here comes Earth Instead of the moon rising, the astronau ...

A partly reusable craft built by the US to send astronauts into space, the shuttle was first launched in April 1981. Space shutt ...

A safe landing Shuttles glide down, belly first. Once the orbiter touches the runway, it releases a 12 m (40 ft) drag chute to s ...

We have all seen workers on a construction site, hammering and drilling. Imagine a construction site floating in space high abov ...

Working in space ExtraVehicular Activity. It means space walking!^285 A piece of history The first ever spacewalk was performed ...

Spacecraft have flown past Mars, orbited it, and landed on its surface. One day, we may even build a base on Mars. It may be col ...

Exploring Mars Approximately US$ 800 million.^287 Living on Mars If we do establish a base on Mars, it will have to be a self-co ...

Our Sun is a star, but it is closer to us than any other star. Like all stars, it is a massive ball of burning gas, fed by const ...

The Sun Yes, it does. It spins on its axis, like the planets of the solar system.^289 Solar flares Blasts of hot gas sometimes f ...

Clusters of stars are constantly being born from clouds of dust and gas thousands of times the size of our solar system, in a pr ...

A star is born The Pleiades, because you can see seven of its stars without a telescope. Cat’s Eye nebula Young solar systems Le ...

Most scientists now believe that the Universe was born from a hot, dense spot more than 13 billion years ago. They call this eve ...

The Big Bang No – it was more of an event.^293 A long time coming Matter only began to form hundreds of thousands of years after ...

Reference section Acceleration Change of speed – speeding up or slowing down. Alpine Areas on a mountain side that are above the ...

Glossary Evaporation The changing of a liquid to a gas. Evergreen A plant that has leaves on it throughout the year. Extinct An ...

Reference section Insulator Something that does not let heat or electricity travel through it very easily. Invertebrate An anima ...

Glossary Planet A large, round object that orbits a star. Population All the people or animals living in an area or country. Pre ...

Index Reference section A acceleration 243, 294 actors 72 Afghanistan 44, 59 Africa 6–7, 18–19 air 110, 262 Alaska 10–11 Albania ...